Marx's thought of alienation is an important analytical paradigm of Marx's critique of capitalism and the construction of the future ideal society. Nowadays,the academic circles have interpreted Marx's thought of alienation in various ways. Therefore,it is the objective demand that the the times expand to clarify the rational orientation and to analyze the pluralistic implication of Marx's thought of alienation.Marx's thought of alienation analyzes the internal essence of capitalism,provides valuable guidance for historical materialism,provides the contradictory dialectics of negation of negation,reveals that the thought of alienation plays a catalytic role of intermediate level of conflict development,provides a comprehensive look at the inherent defects of capitalism,lays out a beautiful blueprint for the development of communism. Hence,a thorough examination of Marx's thought of alienation will help us to have a better understanding and a realistic reference value of historical materialism,dialectics and communism.